how-to
How to Switch Medicare Advantage Plans in 2026
Table of Contents
- Medicare Advantage Open Enrollment Period and Other Times You Can Switch
- Medicare Special Enrollment Period Eligibility: When You Qualify
- Step-by-Step: How to Switch Medicare Advantage Plans
- Switching from Medicare Advantage to Original Medicare
- What Happens to Your Prescriptions, Doctors, and Ongoing Treatments
- Common Mistakes to Avoid When Switching Plans
- Conclusion
- Frequently Asked Questions
Last Updated: September 27, 2026
Medicare Advantage Open Enrollment Period and Other Times You Can Switch
Learning how to switch Medicare Advantage plans starts with knowing your window. Most people can change plans during the Medicare Advantage Open Enrollment Period, January 1 through March 31.
The Medicare Advantage Open Enrollment Period (OEP)
The Medicare Advantage Open Enrollment Period runs January 1 to March 31. Anyone already in a Medicare Advantage plan can switch to a different Advantage plan or drop Advantage and return to Original Medicare.
Annual Enrollment Period (AEP) and Special Enrollment Periods
The Annual Enrollment Period runs from October 15 to December 7 each year. During AEP, you can join, switch, or drop a Medicare Advantage plan, and your new coverage starts January 1.
Medicare Special Enrollment Period Eligibility: When You Qualify
Medicare Special Enrollment Period eligibility depends on one thing: a life event that changes your coverage options.
The most common qualifying events are:
| Life Event | What It Allows | Typical Window |
|---|---|---|
| Moving out of your plan's service area | Join a new Advantage or Part D plan | 2 months from the move |
| Losing employer coverage | Join Advantage, Original Medicare, or Part D | 2 months from loss of coverage |
| Losing Medicaid | Switch to a plan that fits your new status | 2 months from notification |
| Entering or leaving a nursing facility | Change plans | 2 months from the change |
Step-by-Step: How to Switch Medicare Advantage Plans
Switching Medicare Advantage plans takes about an hour of research and one enrollment submission. These steps follow the same order a licensed agent uses, and every tool named is free and federally run.
Step 1: Review Your Current Plan's Annual Notice of Change
Your plan mails an Annual Notice of Change (ANOC) every fall, and it must reach you by September 30. Read it first. Look for three things: premium and deductible changes for next year, drugs removed from the formulary or moved to a higher tier, and providers leaving the network. The ANOC also lists your plan's star rating for the coming year.
Step 2: Build Your Drug and Doctor List Before You Open Any Tool
Before touching the Plan Finder, write down two lists: every prescription you take, with dosage and quantity per month, and every doctor, specialist, hospital, and pharmacy you use. This is the step people skip, and it's why they end up comparing plans on premium alone. The Plan Finder can only match what you enter.
Step 3: Walk Through the Medicare.gov Plan Finder
The Medicare Plan Finder at Medicare.gov is the official comparison tool. It shows every Advantage plan sold in your ZIP code:
- Enter your ZIP code on the Plan Finder landing page and select the year you're shopping for.
- Enter your drugs. Type each medication name, pick the correct dosage and quantity, and add your preferred pharmacy. The tool pulls real-time pricing for that pharmacy.
- Add your providers. Enter each doctor and hospital. The tool flags which plans include them in-network.
- Add your pharmacy preferences. If you use a preferred pharmacy, entering it can change your drug costs significantly.
- Review the plan list. Sort by "Lowest drug + premium cost" rather than premium alone. The tool estimates your total yearly cost, including premiums, deductibles, and drug copays.
- Open each plan's detail page. You'll see the Summary of Benefits, the full drug formulary, and the provider directory link.
- Save your results. The Plan Finder lets you print or save a comparison. Do this before you enroll so you have a record.
Step 4: Check Providers, Drugs, and Coverage
Before you enroll, confirm each item on this list.
- Your primary care physician is in the new plan's network (verify on the plan's own provider directory, not just the Plan Finder)
- Every specialist you see is listed
- Each prescription appears on the plan's formulary at a tier you can afford
- Your preferred pharmacy is in-network
- Any prior authorizations you rely on will carry over
- The plan's star rating is acceptable to you
- The plan's service area covers every place you spend significant time
That prior authorization box matters more than people expect. A new plan can require fresh prior authorization for treatments you've had approved for years.
Step 5: Enroll in Your New Plan
You can enroll three ways:
- Online through Medicare.gov after you finish your Plan Finder comparison
- By phone at 1-800-MEDICARE (1-800-633-4227), available 24 hours a day, 7 days a week
- By paper using the enrollment form the plan mails you
Once your enrollment goes through, your old plan ends automatically. You do not need to cancel it yourself. In fact, you should not try.
- A change during the Medicare Advantage Open Enrollment Period (January 1 - March 31) typically starts the first day of the following month.
- A change during the Annual Enrollment Period (October 15 - December 7) starts January 1.
- A change during a Special Enrollment Period starts the first day of the month after you enroll, unless the SEP rules say otherwise.
Step 6: Confirm Your Enrollment and New Card
After you enroll, the new plan must send you a confirmation. Watch for an enrollment confirmation letter, your new member ID card, and a welcome packet with the Summary of Benefits and provider directory. If you don't receive confirmation within a few weeks, call 1-800-MEDICARE to verify your enrollment status, do not assume it went through.
Switching from Medicare Advantage to Original Medicare
Switching from Medicare Advantage to Original Medicare is allowed during the OEP or a qualifying SEP. You'll return to Parts A and B and can add a standalone Part D drug plan.
What Happens to Your Prescriptions, Doctors, and Ongoing Treatments
Your coverage transition affects more than a card in your wallet. Three things change at once, and the third, ongoing treatments, is where people get hurt.
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Formulary exception request. If a drug you need isn't on the new plan's formulary, you or your prescriber can ask the plan for an exception. The plan must respond within a set timeframe, and you can appeal a denial.
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Transition fill. Most Advantage plans must give you a temporary supply of a non-formulary drug during your first 90 days in the plan, so you have time to file an exception request or switch drugs with your doctor. Ask the new plan for its transition fill policy in writing before you enroll.
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Confirm the doctor is in-network on the plan's own provider directory, not just a third-party site. Directories go stale.
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Ask the doctor's office directly whether they are accepting new patients under that specific plan. Being in-network and accepting new patients are two different things.
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Prior authorizations usually do not transfer between plans. A new plan can require fresh prior authorization for a treatment you've had approved for years. Ask the new plan how it handles continuity of care for your specific condition before you enroll.
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Request a continuity-of-care review. Many plans will honor an existing prior authorization for a limited period if you ask. Get the request in writing and keep a copy.
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Do not schedule a switch in the middle of an active treatment cycle unless you've confirmed in writing that the new plan will cover the next phase.
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Ask for the plan's case management or care coordination contact. For complex conditions, a named contact at the new plan is worth more than any brochure.
The Medigap Trap If You Switch Back to Original Medicare
If you're considering leaving Advantage for Original Medicare, understand the Medigap rule first. When you first enroll in Medicare Part B at 65, you have a six-month Medigap Open Enrollment Period during which insurers must sell you any Medigap policy they offer, regardless of your health. That protection is one-time.
Medicare's Medigap guaranteed issue rights page
Common Mistakes to Avoid When Switching Plans
The biggest mistake is assuming your doctors will still be covered. Networks change every year; a plan that included your cardiologist last year may not this year.
Other errors that cost people real money:
- Comparing premiums only. Total annual cost, including drugs and copays, tells the real story.
- Missing the deadline. Each enrollment window closes on a fixed date. There's no grace period.
- Forgetting Part D. If you drop drug coverage and go without it, you may face a late enrollment penalty when you rejoin.
- Skipping the Summary of Benefits. This document lists copayments, coinsurance, and prior authorization rules. Read it before you commit.
- Not checking the service area. If you travel or split time between two homes, confirm the plan covers you in both places.
Conclusion
Switching Medicare Advantage plans comes down to timing, research, and one careful check of your drugs and doctors.
Frequently Asked Questions
Can I switch from one Medicare Advantage plan to another?
Yes, you can switch Medicare Advantage plans during the Medicare Advantage Open Enrollment Period, which runs from January 1 to March 31 each year, or during the Annual Enrollment Period from October 15 to December 7. You can also switch if you qualify for a Special Enrollment Period, such as moving out of your plan's service area or losing other coverage. Outside these windows, you generally cannot change plans unless you have a qualifying life event.
When is the Medicare Advantage Open Enrollment Period?
The Medicare Advantage Open Enrollment Period runs from January 1 through March 31 every year. During this window, if you are already enrolled in a Medicare Advantage plan, you can switch to a different Medicare Advantage plan or drop your Medicare Advantage coverage and return to Original Medicare. You can only make one change during this period. If you switch to Original Medicare, you may also need to enroll in a standalone Part D prescription drug plan.
Do I need to cancel my old Medicare Advantage plan before switching?
No, you do not need to cancel your old plan yourself. When you enroll in a new Medicare Advantage plan, the new plan will notify Medicare, and your old plan will automatically be disenrolled. Your new coverage typically takes effect on the first day of the month after you enroll, though this depends on when you apply. If you switch to Original Medicare instead, you may need to actively disenroll from your Medicare Advantage plan.
What happens to my prescription drug coverage when I switch plans?
Your prescription drug coverage is included in most Medicare Advantage plans, so switching plans means your drug coverage changes too. Each plan has its own formulary, which is the list of covered drugs, and its own co-payments and coinsurance. Before you switch, check that your new plan covers all your medications at a cost you can manage. If you move to Original Medicare, you will need to enroll in a separate Part D plan to keep drug coverage.